WYOMING STATE GEOLOGICAL SURVEY GEOLOGIC MAP OF …

WYOMING STATE GEOLOGICAL SURVEY Thomas A. Drean

Director and State Geologist Laramie, Wyoming

Geology - Interpreting the past - providing for the future

45?0'N

110?0'W

109?30'W

Yellowstone National Park

44?30'N

44?0'N

GEOLOGIC MAP OF THE BIGHORN BASIN, WYOMING

109?0'W

108?30'W

M O N TA N A

108?0'W

107?30'W

107?0'W

EXPLANATION

45?0'N

:

((

Formation contact

MAP SYMBOLS

Normal faultL >CC54F 85A53>=351;5421;;1=421A>=4>F =C8A>F =2;>3: =>45B97=1C9>= >=61D;CCA1359=4931C5BD=45C5A=

Thrust faultL >CC54F 85A53>=351;54B1F C55C8>=D?C8A>F =C53C>=931;;H89785A2;>3:

_ >D=CHB51C

U 9CH>AC>F = "1: 5>AA5B5AE>9A

(/3 0

+) 8978F 1H

!(59

) C1C58978F 1H

")59

>D=CH>A>C85AA>14

-92=>4D(=49E15AHA( 5B5AE1C9>= >D=CH2>D=41AH

) C1C52>D=41AH

44?30'N 44?0'N

CENOZOIC

GEOLOGIC UNITS (Geology enlarged from 1:500,000 scale to improve readability)

Quaternary

'Q1a ;;DE9D;;DE9D< ' QCt A1E5;?549B9CB 'Q7g ;1391;45?>B9CB 'Ql;sB "1=4B;94545?>B9CB 'QDu ) DA69391;45?>B9CBD=49665A5=C91C54

Quaternary and Tertiary

'QT*g7 *5AA1357A1E5;

Cretaceous and Jurassic

!KJ ;>E5A;H1=4#>AA9B>=>A=B !KJBs ;>E5A;H#>AA9B>=1=4) D=41=35>A=B !KJ7g ;>E5A;H#>AA9B>=) D=41=351=4H?BDA=B

Jurassic

BJs ) D=41=35>A= JBs7g ) D=41=351=4H?BDA=B

Jurassic and Triassic

Tertiary

/J^ ) D=41=351=4H?BDA=B1=4$D775C) 1=4BC>=5

*Th8rA D3: ;525AAH( 9475*D66>6. 5;;>F BC>=5A>D?

*TmA4>A=BK9=?;135BDC&51: *A138H1=45B9C5>6) D=;978CA>D?

2B1A :>1 , ;>31=93 )D 5?A7A>D?

*TCt

*5?55*A19;>A=

*Ta1

H3A>BB>A=

*TtCsB

*8>A>61A5A55: 1=4) D=;978CA>D?BK9=3;D45B*F >%351=1=4 "1=76>A4>A=B*A>DC&51: *A138H1=45B9C51=4 - 1?9C9>A=

*TsB

) D=;978CA>D?K9=3;D45B*A>DC&51: *A138H1=45B9C5- 1?9C9 >A=A5B35=C9;;1B1;C1=4#>D=C- 1;;135 >A=

*TtCp?

*A>DC&51: *A138H1=45B9C5

*TwFp?

- 1?9C9>A=

*Ta1wF

- 1B82DA=A>D?K9=3;D45B) 5?D;385A"1A=B

J/^7g3c H?BDA=$D775C) 1=4BC>=51=48D7F 1C5A >A=

Triassic

/ 3^c 8D7F 1C5A>A=>AA>D? /^3c4d 8D7F 1C5A1=49=F >>4H>A=B

MESOZOIC AND PALEOZOIC

/^&P3cg7 8D7F 1C5A1=4>>B577>A=B /^&P7g >>B577>A= #MzIP&zI #5B>I >931=4&1;5>I >93A>3: BD=49665A5=C91C54

PALEOZOIC Permian

&?Pp &8>B?8>A91>A=1=4A5;1C54A>3: B

Permian, Pennsylvanian, and Mississippian

&P#M *5=B;55?) 1=4BC>=51=4A=

Mississippian

#M="9=5>AA>D?

Mississippian and Devonian

*TwFb2 - 17>=54>A=

#MD #149B>="9=51=41A2H>A=

*TtCa1 *1CA=

Mississippian, Devonian, and Ordovician

*TwFl ; - 9;;F >>4>A= *Ti9m< =491=#514>F B>A= *Tc3rA A1=41;;>=7;>AC+=9>=>A=

MESOZOIC Cretaceous

#MDO%#149B>="9=51A2H>A*8A55>A: B5665AB>=1=451AC>>C8

DCC5>A=B1=4978>A=>;>="9=51=4978>A=>;>A: B5665AB>=1=451AC>>C8DCC5>A=B1=4978>A= >;>DBA>3: B

Ordovician

!K;l "1=35>A=

%O2b 978>A=>;>A= !KmA= !K3c >4H) 81;5 !K6f A>=C95A>A= !Kf6tC A>=C95A>A=#>F AH) 81;5#D44H) 1=4BC>=51=4

*85A?>;9B) 81;5 !KmF AH) 81;5#D44H) 1=4BC>=51=4*85A?>;9B) 81;5

Ordovician and Cambrian

%O0^ 978>A=>;>B, 5=CA5>A=1=45@D9E1;5=CB1=4 ;1C8514) 1=4BC>=5

PRECAMBRIAN

pA^u &A5313: BD=49665A5=C91C54

43?30'N

BASIN LOCATION MAP

110?0'W

Map Projection: Lambert Conformal Conic False Easting: 500000, False Northing: 200000 Central Meridian: -107.5 degrees West Standard Parallel 1: 41 degrees North Standard Parallel 2: 45 degrees North Latitude of Origin: 41 degrees North Linear Unit: Meter Horizontal Datum: North American Datum of 1983 (NAD 83) Ellipsoid: Geodetic Reference System 80

109?30'W

N

MN

#17=5C9353;9=1C9>=

J

1C35=C5A>6 ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download